Phytoremediation ability of tree species for heavy metals absorption

Phytoextraction exploits the ability of plant roots to remove unwanted contaminants from their environment. Unlike organic compounds, metals do not disappear, and they must be removed for cleaning. Most of the conventional remedial technologies are expensive and inhibit the soil fertility; this subsequently causes negative impacts on the ecosystem. The purpose of this study was to investigate the effects of high cadmium and lead soil concentrations on selected physiological parameters of three tree species as: Robinia pseudoacacia, Cupressus arizonica and Fraxinus rotundifolia var.rotundifolia.